Лаборатория иш №1


Tajriba natijalarini yozish va hisoblashni quyidagi tartibda olib boring


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Tajriba natijalarini yozish va hisoblashni quyidagi tartibda olib boring:
Kalorimеtrdagi suvning massasi --------------m
Olingan tuzning massasi -------------------------mтуз
Haroratlar farqi----------------------------------- t t20 - t10
Tuzning nisbiy molеkulyar massasi-----------Мr(tuz)


Tuzning erish issiqligi quyidagi formula bilan aniqlanadi:

bu еrda Qe.i - tuzning erish issiqligi;
С - eritmaning solishtirma issiqlik sig’imi, u 4,18 kj/g-grad.
Tuzning erish issiqligini nazariy qiymatini 1-jadvaldan olib, tajribada qilingan absolyut ∆Q va nisbiy dxatolarni quyidagi formulalar yordamida hisoblang:
.


1-jadval

Moddalar

Erish issiqligi
kj/g-grad

Moddalar

Erish issiqligi
kj/g-grad

КN03

-35,75

ZnSO4

+77,59

NaNO3

-21,08

ZnSO4. 7H20

- 17,9

NH4NO3

-26,90

CuSO4

+66,54

NH4Cl

-16,30

CuSO4. 5H2O

-11,70

K2SO4

-26,88

Na2SO4

+2,30

Na2CO3

+23,60

Na2SO4. 10H2O

-78,51

Na2CO3. 10H2O

-66,58

KOH

+53,18



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